File corruption usually happens when submitting files over the internet with poor transfer speeds, or when creating very large compressed files. Transfer speed is determined by several factors: your internet connection, file size, and even time of day. If you have received notification that your files are corrupt, please upload your files again. There will be no additional fees charged. Be sure to try and successfully open the files again on your end before resending. And do not send the same compressed file, but try recompressing your files. If you continue to have problems, please consider overnighting us your artwork on disk.